Vulcanizing press



y 1933. H. WALTHER VULCANIZING PRESS Filed Feb. 24, 1932 or L Patented" July 25 1933 HEINRICH WAIQT'H Q or FRArtKi oR'r-ON-THE-MAIN-OBERRAD, GERMANY 'vuricnniziue rrtnss Application 'fii'e'a February 24,1932; Serial No. 594,329, ad. in Germany September 23, 1931.

of shoe and every form many metallic sole forms adapted to 'be heated and" a corresponding number of. metallic lasts were in dispensible if a reasonable amount of work had to be done. For'eifecting'the yvulcani zation the'sole forms had to be held in conable pressure a'ndflat' a'certain perature for half an hour." According to another method of manu-' facturing shoes with rubber soles applied by vulcanization 'metallicsole forms notadapt ed to be heated andthe metallic lasts with the shoes thereon are at first pressed against each other and are then deposited inbulk precise temin big heating I drums wherein they are left for a certainltime.

It is evident that already of the forms for the soles and the'lasts entails enormous expenses inview of the fact that for every size, every width and every shape of the shoe for right and left shoes a separate sole and last form-"is necessary. Moreover the means for hea'ting the" forms and the lasts is very expensive.

The present invention-has for its object'a vulcanizing press which may be obtained for a relativelysmallprice and which gives a great output and issimpleto operate, To small and middle factories is therefore afforded the opportunity to ananufacture shoes with soles applied by vulcanization without investing v considerable sums for the machines. j. I

In the drawing an embodiment'of'the inventionis shown.

brought to. thedesired temperature and are Fig.- 1' illustrates the general construction 7 an axialsection. V I I Fig; 2 shows a part of'the machine in a front View, partly in a cross section; f 7

Fig. 8 showsalongitudinal section-of the "front part of the shaft and of; the steam distributor.-

Y i Fig. 4 is a front view of the inlet and outlet of thesteam and of the valves. 3

i of the machin'einan elevation and partly in tact with the lasted shoes under a consider a material '11 insulating the heat.

' ible "materiah the production Figs. 5'an'd 6 are schematical viewsof the Steam distributor in a cross section on the lines A+B and CD of Fig.3.

Fig -7sh0ws a detail. a

In the fixed standards 1 and 2 is journaled the shaft 3 (Fig. '1). On the shaft 3 is fastened the circular carrier 4 to which are screwedthe front and the rear brackets 5 and 6 which carry at 7 and S the pressing dev ces; Every pressing device consists of a pressing pan 9' encircled by the insulating panlO the free space of which is filled with To the pressing pan 9 is fastened by screwing a tightening ring 13 a'press cover 12 of a hex- V The insulating pan 10 is likewise fastened to the press pan 9. This all forms the pressing deviceor pressing cushion. Only "the arrangement described the pressing device has a pressing chamber 1a wherein a pressure may be created by steam or a heating gas supplied by the pipe joints 15, 16.. The heat, insulating material 11 is inserted into the pressing devices in a manner as a propagation of the heat through the H "cover 12 in contact with the work piece is fully obtainediwhile the undesirable radiation in other directions is obviated. Further the pressure devices are inclined so that the condensate may drain through the joint 16. The inclination is directed against the face of the attendant so that he may easily work and have a good sight.

' The heat and pressure medium as steam,

gas, water is'supplied by 'means of 'a distributori? The distributor consists of the outer body rotating with the shaft 3 and @withthe carrier L and which is connected with the pressing devices through the inlet'pipes 17 and the outlet pipes 18. The distributor consists further of the parts 19, 24 connectedto eachother and the standard 1. The distributor has to control the passage ofthe heat andpressure mediumcoming'from a producer'and to free or partly or V wholly close the passage accordingto the requirements andto distribute the medium to the single pressing devices. Tothis end the front part 19 has three chambers a, b, a. The chamber-a may be denominated as the fresh gas chamber and is by means of the interposed cut-01f valve and the reducing V valve 21 provided with the manometer 39 in direct communication with the producer of It comma the pressure and heat medium. nicates through the longitudinal channel a/ with. the ring channel 0/, of the part L. The chamber'o communicates throughjthe longitudinal channel '0 with the ring channel 0" of the part 24: and r with the safety I valve 23. Y The chamber 6 is for the exhaust gases and it leads to the exhaust pipes 22; The chamber 0 with the adjustible Valve 23 for the superpr-essure serves as a superpres:

sure chambeix' The front part 19 is tightly Onthe ringlike inner member 24 rotates together with the inlet bores 28 and the .out let bores 29-the ringli-ke outer11ie1nber30 by being connected through the coupling bolts 82 and the brackets 31 to the rotating carrier 4. Each bore 28. is connected to the pressing device by the pipe 17 and eachbore 29is connected thereto by the pip'e'19. bores 28 coinunicate withtlie ring channelcand allow by these means the'fresh steam to pass from the chamber a; into the pressure chambers 14- of the pressing devices. Out ofthe bores 29. only one can communlcate at a time with the longitudinal channel Y) and the'exhaust chamber 5. The live steam is admittedthrough the ringqchannel a to'all pressing devices-except the one device the admission bore 28 of which is ust closed as shown in "Fig. '6. VVhile' the admission to this pressing device is cut-oil its exhaustbore '29 communication with the channel b and the.exhaust-chamber b, as llustrated in Fig. {Mostofthe other exhaust,

bores 29 remain in communication with the ring-channehc. If an exceeding pressure is introducedbr ii it is createdby the press-.

ing process, then .the safety valve 23 of the ring-channel ,o s openediand the pressure mediuinfin'ds lijS. way into the atmosphere.

'The valve 23isso adjusted that a;.small' quantity ofthe steam is perpetually being exhausted so that fresh steam canbe introjduced. Fig. 5 shows that the channel-b s so shaped that lnrotatmgin a clockwlse direction it registers not only with the upper-- mo'stboreQE) but also with the nextfollow 111g one. By these means the heating gas can beireely blown through the pressing device onto which;theiwork pieceg has been ust placed in order to removethe The packingrings 33 on bothsides,

, 7 cold resi .duesofthe gas from thisdevice;

body are pressed by the nuts against the-packing material 34 and assure the necessary tightness. The nuts 35 are crosswise provided with holes so that they may be tightened by a-bolt introduced in a hole.

The machine isattended to and is operated as follows? I A workfpiece (a shoe) to be vulcanized is placed upright by hand upon a pressing de- {vice of the machine, preferably upon the up- :permost one. Thenfthe' slide 47 .with the roll 53 ismovedupwards by the slide 57 by means of a handle or a'treadle. Whereby the" adjusting S rew 52 abuts against the dog 51 ofthe pressing lever 38 jQm-nnea on the pivot5510f the bracketfi so that the stirrup 37 and its pressing feet'365-43 are swung against the work-piece; The slide 4:7 is' held in this position by thetoothed lever 49 which islactedfuponby a spring. Thetreadle or handle can now be released; In this manner shoes are introduced into all pressingdevices whereupon the pressing devices areput under pressure. This is done by opening the shut-off Valve 20. y The heating pressure me P dium flows at first through the pressure reducing valve 21 which-is adjusted fo'r the necessary Working pressure and automatically prevents the pressure to exceed the al.-

low'ed-limit; At the same time arnan'ometer 39 arranged on the reducing valve indicates "the height of the pressure. Theheating pressure medium enters the chamber a flows through thechannel a and comesf into the ringlike distributing channel a (Fig. 6); 111

The branch holes 28 arranged in the circumference ofthe outer ring 30 arein communication with the distributing 1 channel a. The pressure mediumcan now. pass through v v the holes 28 and theducts-lf into the'presby the cut-oil. cam/l2, ot the "member 24,

sure chambers 14. The cover l2ris now pressed against the workpiece, zit presses the sole 'mandemm by theheatjof the pressure medi unrthe vulcanization. Through the ducts .18 and the holes 29 of theouter ring 30, Fig. 5, the pressure roomslel; communicatefwith the ringlike superpressure channel 0'. and through the longitudinal channel 0- they communicate with the chamher 0; of .thepart 19. The reducing valve 23 1i .ofthe chamber 0 is so adjusted that a small dens'ation' off the: pressure medium Within the machine isalmost wholly-prevented- At anytime the uppermost hole 291 of theouter distributor communicates with the outlet channel which itself communicates. with the outlet chamberli b of the part, 19, by the arrangement of the closing cam 42 and of the outlet 'holejb, it is obtainedthat the press ng device occupying the uppermost middle position is out of'the pressure-region. The machine 1s automatically and succeeds 1ngly rotated in any well known mannerand comes to rest after every partial rotation in order to allow the removal and the introduction of the work-piece. When the machine is rotating the roll 53 Comes to ride over the cam-disc 58 fastened to the frame 2, so that the pressing members on all shoes have the same position. vented that these members hang down in their lower position in the case the attendant omits to operate the handle or the treadle.

The shaft 1 is rotated every time for one pressing device so that all devices are succeedingly freed from pressure. As soon as the single device leaves the middle position it is again under pressure which lasts until the machine performs one revolution and en ters once more intothe middle position.

Simultaneously with the entering into the middle position every device rides with the cam56 of the elbow lever 49 upon a releasing roll 54 so that this lever is tilted and freed. The spring 50 brings the pressuremembers untilnow locked back into their highest position; It is evident that the described movements are the same with every pressing device. r What I claim is: 1. In a vulcanizing press for applying soles to shoes, a rotatable carrier, a plurality of pressing and heating cushions on the carrier abutments for the shoes, cooperating with the cushions, a 'fixed inlet of a heated pressure medium, a centrally arranged-dis:

tributor connected to the inlet of the heated medium, and ducts in the distributor and in the rotatable carrier arranged to create a aconstant communication between the said inlet and the most .of the cushions and to cut-off thiscommunication between the said inlet and the rest of the cushions.

2. I11 a vulcanizing press for applying soles to shoes, a rotatable :arrier, a plurality of pressing and heating cushions on the carrier abutlnents for the shoes cooperating with the cushions, a fixed inlet of a heated pressure medium, a centrally arranged distributor connected to the inlet of the heated medium, and ducts in the distributor and in the rotatable carrier arranged to create a constantcommunication between the said inlet and all the cushions but one and to cut-01f this communication between the said inlet and the said one cushion.

Further it is thereby pre 3. Ina vulcanizing press for applying soles to shoes, a rotatable carrier, a plurality of pressing and heating cushions on the carrier. abutments forthe shoes cooperating with the cushions, a fixed inlet of a heated pressure medium, a centrally arranged distributor connected to the inlet of the heated medium, ducts in the distributor and in the rotatable carrier arranged to create a .constant communication between the said inlet and the most of thecushions and to cut ofi rier abutment-s for the shoes cooperating with the cushions, a fixed inlet of a heated pressure medium, a centrally arranged distributor connected to'the inlet of the heated medium, and ducts in the distributor and in the rotatable carrier arranged to create a constant communication between the said inlet and all the cushions. but one, to cut-oft" this communication between the said inlet and the said one cushion, exhaust ducts leading from the cut-off cushion into the atinosphere, and ducts in the distributor and in the rotatable carrier arranged to afford to the medium a free passage from a cushion communicating with the inlet of the medium through the cushion cut-01f from the said source into the exhaust ducts.

5. In a vulcamzmg press for applying soles to shoes, a rotatable'carrien'a plurality of pressing and heating cushions arranged on the carrier inclined at an acute angle, to

the horizontal, and abutments for the shoes cooperating with the said cushions.

6. In a vulcanizing press for applying soles to shoes, .a rotatable carrier, a plurality of pressing'and heating cushions arranged on the carrier,every cushion consisting of a pan .clo'sed by a yielding cover and accommodated .111 second pan, the free space between both pans being filled with a heat insulating material, and abutments forthe shoes cooperating with the said cushions;

" HEINRICH WALTHER. 

